2056610111557 has 16 divisors (see below), whose sum is σ = 2120889754368. Its totient is φ = 1993279288000.

The previous prime is 2056610111519. The next prime is 2056610111581. The reversal of 2056610111557 is 7551110166502.

It is a cyclic number.

It is not a de Polignac number, because 2056610111557 - 2¹⁹ = 2056609587269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056610118557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53397807 + ... + 53436307.

It is an arithmetic number, because the mean of its divisors is an integer number (132555609648).

Almost surely, 2^{2056610111557} is an apocalyptic number.

It is an amenable number.

2056610111557 is a deficient number, since it is larger than the sum of its proper divisors (64279642811).

2056610111557 is a wasteful number, since it uses less digits than its factorization.

2056610111557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50780.

The product of its (nonzero) digits is 63000, while the sum is 40.

Subtracting 2056610111557 from its reverse (7551110166502), we obtain a palindrome (5494500054945).

The spelling of 2056610111557 in words is "two trillion, fifty-six billion, six hundred ten million, one hundred eleven thousand, five hundred fifty-seven".